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Mode<br />
The optical input and output can be configured separately either as S/PDIF or ADAT.<br />
This means mixing of both digital <strong>for</strong>mats is possible as the LAGOON supports<br />
mixed mode operation.<br />
If you configure the input as ADAT, you may further activate a ‘Toshiba to Sharp’<br />
filter by clicking on Options and then on T2S. (T2S is activated if you see a check).<br />
The T2S is intended to compensate <strong>for</strong> differences on the optical jacks manufactured<br />
by Toshiba and Sharp. If you have external equipment with optical jacks from<br />
Toshiba (like the LAGOON card), you will not need the T2S. If you have equipment<br />
that uses optical jacks from Sharp (like ADAT recorders), you should activate T2S<br />
(even if in most cases this is not necessary). Activating T2S then helps reduce jitter.<br />
Even if jitter does not have any influence on quality as long as you stay in the digital<br />
domain (e.g. if you are recording to a hard disk or to an external ADAT recorder),<br />
feeding external analog converters with an optical signal that has jitter usually<br />
worsens audio quality.<br />
If you do not know what kind of optical jack is used by your external equipment,<br />
turn off T2S. Remember: T2S only achieves a slight improvement, the LAGOON<br />
card will also work without T2S using Sharp-based devices.<br />
Warning: Always set the correct <strong>for</strong>mat at the output. Choosing a<br />
wrong <strong>for</strong>mat (e.g. sending an S/PDIF signal to an ADAT device)<br />
may result in noise signals with maximum level generated at the<br />
receiving device !<br />
Clock Source<br />
Whenever your intention is to synchronize your application software to an ADAT<br />
recorder, ADAT Sync In is the choice. MIDI Machine Control, ADAT Time Code<br />
and ADAT Word Clock coming in from the ADAT Sync cable then will give the<br />
LAGOON card the ability of Time Code locked recording and playback. In this case,<br />
the ADAT recorder acts as a sync master and the LAGOON as the sync slave.<br />
For external equipment other than ADAT recorders choose Optical In as Clock<br />
source. This is suitable when recording from CD players or DAT recorders.<br />
If you want to have the LAGOON card acting as a clock master, choose LAGOON<br />
as Clock source. Now you can play back to DAT recorders or to external D/A<br />
converters. However, recording is only possible if your external device is clocked by<br />
the LAGOON card. Otherwise recording will lead to audible distortions.<br />
Hint: For best per<strong>for</strong>mance using external analog converters, they should be chosen<br />
to be the master. If this is done, they generate the clock themselves, which is much<br />
more precise than feeding them with an external clock. In that case the right setting<br />
<strong>for</strong> Clock source will be Optical In.<br />
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